ixm1200_machdep.c revision 1.10
1 /* $NetBSD: ixm1200_machdep.c,v 1.10 2002/12/02 14:25:38 ichiro Exp $ */ 2 #undef DEBUG_BEFOREMMU 3 /* 4 * Copyright (c) 2002 5 * Ichiro FUKUHARA <ichiro (at) ichiro.org>. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Ichiro FUKUHARA. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 27 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 /* 36 * Copyright (c) 1997,1998 Mark Brinicombe. 37 * Copyright (c) 1997,1998 Causality Limited. 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * This product includes software developed by Mark Brinicombe 51 * for the NetBSD Project. 52 * 4. The name of the company nor the name of the author may be used to 53 * endorse or promote products derived from this software without specific 54 * prior written permission. 55 * 56 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 57 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 58 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 59 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 60 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 61 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 62 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 63 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 64 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 65 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 66 * SUCH DAMAGE. 67 */ 68 69 #include "opt_ddb.h" 70 #include "opt_pmap_debug.h" 71 72 #include <sys/param.h> 73 #include <sys/device.h> 74 #include <sys/systm.h> 75 #include <sys/kernel.h> 76 #include <sys/exec.h> 77 #include <sys/proc.h> 78 #include <sys/msgbuf.h> 79 #include <sys/reboot.h> 80 #include <sys/termios.h> 81 82 #include <dev/cons.h> 83 84 #ifdef DDB 85 #include <machine/db_machdep.h> 86 #include <ddb/db_sym.h> 87 #include <ddb/db_extern.h> 88 #ifndef DB_ELFSIZE 89 #error Must define DB_ELFSIZE! 90 #endif 91 #define ELFSIZE DB_ELFSIZE 92 #include <sys/exec_elf.h> 93 #endif 94 95 #include <machine/bootconfig.h> 96 #include <machine/bus.h> 97 #include <machine/cpu.h> 98 #include <machine/frame.h> 99 #include <arm/undefined.h> 100 101 #include <arm/arm32/machdep.h> 102 103 #include <arm/ixp12x0/ixp12x0reg.h> 104 #include <arm/ixp12x0/ixp12x0var.h> 105 #include <arm/ixp12x0/ixp12x0_comreg.h> 106 #include <arm/ixp12x0/ixp12x0_comvar.h> 107 #include <arm/ixp12x0/ixp12x0_pcireg.h> 108 109 #include <evbarm/ixm1200/ixm1200reg.h> 110 #include <evbarm/ixm1200/ixm1200var.h> 111 112 #include "opt_ipkdb.h" 113 114 /* XXX for consinit related hacks */ 115 #include <sys/conf.h> 116 117 void ixp12x0_reset(void) __attribute__((noreturn)); 118 119 /* 120 * Address to call from cpu_reset() to reset the machine. 121 * This is machine architecture dependant as it varies depending 122 * on where the ROM appears when you turn the MMU off. 123 */ 124 125 u_int cpu_reset_address = (u_int) ixp12x0_reset; 126 127 /* 128 * Define the default console speed for the board. 129 */ 130 #ifndef CONMODE 131 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 132 #endif 133 #ifndef CONSPEED 134 #define CONSPEED B38400 135 #endif 136 #ifndef CONADDR 137 #define CONADDR IXPCOM_UART_BASE 138 #endif 139 140 cons_decl(com); 141 cons_decl(ixpcom); 142 143 struct consdev constab[] = { 144 #if (NIXPCOM > 0) 145 cons_init(ixpcom), 146 #endif 147 { 0 }, 148 }; 149 150 /* Define various stack sizes in pages */ 151 #define IRQ_STACK_SIZE 1 152 #define ABT_STACK_SIZE 1 153 #ifdef IPKDB 154 #define UND_STACK_SIZE 2 155 #else 156 #define UND_STACK_SIZE 1 157 #endif 158 159 BootConfig bootconfig; /* Boot config storage */ 160 char *boot_args = NULL; 161 char *boot_file = NULL; 162 163 vm_offset_t physical_start; 164 vm_offset_t physical_freestart; 165 vm_offset_t physical_freeend; 166 vm_offset_t physical_end; 167 u_int free_pages; 168 vm_offset_t pagetables_start; 169 int physmem = 0; 170 171 /*int debug_flags;*/ 172 #ifndef PMAP_STATIC_L1S 173 int max_processes = 64; /* Default number */ 174 #endif /* !PMAP_STATIC_L1S */ 175 176 /* Physical and virtual addresses for some global pages */ 177 pv_addr_t systempage; 178 pv_addr_t irqstack; 179 pv_addr_t undstack; 180 pv_addr_t abtstack; 181 pv_addr_t kernelstack; 182 183 vm_offset_t msgbufphys; 184 185 extern u_int data_abort_handler_address; 186 extern u_int prefetch_abort_handler_address; 187 extern u_int undefined_handler_address; 188 extern int end; 189 190 #ifdef PMAP_DEBUG 191 extern int pmap_debug_level; 192 #endif /* PMAP_DEBUG */ 193 194 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 195 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 196 #define KERNEL_PT_KERNEL_NUM 2 197 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 198 /* Page table for mapping IO */ 199 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 200 /* Page tables for mapping kernel VM */ 201 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 202 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 203 204 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 205 206 struct user *proc0paddr; 207 208 #ifdef CPU_IXP12X0 209 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 210 extern unsigned int ixp12x0_cache_clean_addr; 211 extern unsigned int ixp12x0_cache_clean_size; 212 static vaddr_t ixp12x0_cc_base; 213 #endif /* CPU_IXP12X0 */ 214 215 /* Prototypes */ 216 217 void consinit __P((void)); 218 u_int cpu_get_control __P((void)); 219 220 void ixdp_ixp12x0_cc_setup(void); 221 222 #ifdef DEBUG_BEFOREMMU 223 static void fakecninit(); 224 #endif 225 226 extern int db_trapper(u_int, u_int, trapframe_t *, int); 227 228 /* 229 * void cpu_reboot(int howto, char *bootstr) 230 * 231 * Reboots the system 232 * 233 * Deal with any syncing, unmounting, dumping and shutdown hooks, 234 * then reset the CPU. 235 */ 236 237 void 238 cpu_reboot(howto, bootstr) 239 int howto; 240 char *bootstr; 241 { 242 /* 243 * If we are still cold then hit the air brakes 244 * and crash to earth fast 245 */ 246 if (cold) { 247 doshutdownhooks(); 248 printf("Halted while still in the ICE age.\n"); 249 printf("The operating system has halted.\n"); 250 printf("Please press any key to reboot.\n\n"); 251 cngetc(); 252 printf("rebooting...\n"); 253 ixp12x0_reset(); 254 } 255 256 /* Disable console buffering */ 257 cnpollc(1); 258 259 /* 260 * If RB_NOSYNC was not specified sync the discs. 261 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 262 * It looks like syslogd is getting woken up only to find that it cannot 263 * page part of the binary in as the filesystem has been unmounted. 264 */ 265 if (!(howto & RB_NOSYNC)) 266 bootsync(); 267 268 /* Say NO to interrupts */ 269 splhigh(); 270 271 /* Do a dump if requested. */ 272 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 273 dumpsys(); 274 275 /* Run any shutdown hooks */ 276 doshutdownhooks(); 277 278 /* Make sure IRQ's are disabled */ 279 IRQdisable; 280 281 if (howto & RB_HALT) { 282 printf("The operating system has halted.\n"); 283 printf("Please press any key to reboot.\n\n"); 284 cngetc(); 285 } 286 287 printf("rebooting...\n"); 288 289 /* all interrupts are disabled */ 290 disable_interrupts(I32_bit); 291 292 ixp12x0_reset(); 293 294 /* ...and if that didn't work, just croak. */ 295 printf("RESET FAILED!\n"); 296 for (;;); 297 } 298 299 /* 300 * pmap table 301 */ 302 /* 303 * IXM1200 specific I/O registers mapping table 304 */ 305 static struct pmap_ent map_tbl_ixm1200[] = { 306 { "IXM1200 SlowPort I/O Registers", 307 IXM1200_LED_VADDR, IXM1200_LED_ADDR, 308 IXM1200_LED_ADDR_SIZE, 309 VM_PROT_READ|VM_PROT_WRITE, 310 PTE_NOCACHE, }, 311 312 { NULL, 313 0, 314 0, 315 0, 316 0, 317 0, 318 } 319 }; 320 321 /* 322 * Initial entry point on startup. This gets called before main() is 323 * entered. 324 * It should be responsible for setting up everything that must be 325 * in place when main is called. 326 * This includes 327 * Taking a copy of the boot configuration structure. 328 * Initialising the physical console so characters can be printed. 329 * Setting up page tables for the kernel 330 * Relocating the kernel to the bottom of physical memory 331 */ 332 u_int 333 initarm(void *arg) 334 { 335 int loop; 336 int loop1; 337 u_int kerneldatasize, symbolsize; 338 vaddr_t l1pagetable; 339 vaddr_t freemempos; 340 pv_addr_t kernel_l1pt; 341 pv_addr_t kernel_ptpt; 342 #ifdef DDB 343 Elf_Shdr *sh; 344 #endif 345 346 #ifdef DEBUG_BEFOREMMU 347 /* 348 * At this point, we cannot call real consinit(). 349 * Just call a faked up version of consinit(), which does the thing 350 * with MMU disabled. 351 */ 352 fakecninit(); 353 #endif 354 /* 355 * Since we map v0xf0000000 == p0x90000000, it's possible for 356 * us to initialize the console now. 357 */ 358 consinit(); 359 360 /* Talk to the user */ 361 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 362 363 /* 364 * Heads up ... Setup the CPU / MMU / TLB functions 365 */ 366 if (set_cpufuncs()) 367 panic("cpu not recognized!"); 368 369 /* XXX overwrite bootconfig to hardcoded values */ 370 bootconfig.dram[0].address = 0xc0000000; 371 bootconfig.dram[0].pages = 0x10000000 / NBPG; /* SDRAM 256MB */ 372 bootconfig.dramblocks = 1; 373 374 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 375 376 symbolsize = 0; 377 378 #ifdef PMAP_DEBUG 379 pmap_debug(-1); 380 #endif 381 382 #ifdef DDB 383 if (! memcmp(&end, "\177ELF", 4)) { 384 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 385 loop = ((Elf_Ehdr *)&end)->e_shnum; 386 for(; loop; loop--, sh++) 387 if (sh->sh_offset > 0 && 388 (sh->sh_offset + sh->sh_size) > symbolsize) 389 symbolsize = sh->sh_offset + sh->sh_size; 390 } 391 #endif 392 printf("kernsize=0x%x\n", kerneldatasize); 393 kerneldatasize += symbolsize; 394 kerneldatasize = ((kerneldatasize - 1) & ~(NBPG * 4 - 1)) + NBPG * 8; 395 396 /* 397 * Set up the variables that define the availablilty of physcial 398 * memory 399 */ 400 physical_start = bootconfig.dram[0].address; 401 physical_end = physical_start + (bootconfig.dram[0].pages * NBPG); 402 403 physical_freestart = physical_start 404 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 405 physical_freeend = physical_end; 406 407 physmem = (physical_end - physical_start) / NBPG; 408 409 freemempos = 0xc0000000; 410 411 #ifdef VERBOSE_INIT_ARM 412 printf("Allocating page tables\n"); 413 #endif 414 free_pages = (physical_freeend - physical_freestart) / NBPG; 415 416 #ifdef VERBOSE_INIT_ARM 417 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 418 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 419 physical_freestart, free_pages, free_pages); 420 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 421 physical_start, physical_end); 422 #endif 423 424 /* Define a macro to simplify memory allocation */ 425 #define valloc_pages(var, np) \ 426 alloc_pages((var).pv_pa, (np)); \ 427 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 428 #define alloc_pages(var, np) \ 429 (var) = freemempos; \ 430 memset((char *)(var), 0, ((np) * NBPG)); \ 431 freemempos += (np) * NBPG; 432 433 loop1 = 0; 434 kernel_l1pt.pv_pa = 0; 435 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 436 /* Are we 16KB aligned for an L1 ? */ 437 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 438 && kernel_l1pt.pv_pa == 0) { 439 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / NBPG); 440 } else { 441 alloc_pages(kernel_pt_table[loop1].pv_pa, 442 L2_TABLE_SIZE / NBPG); 443 kernel_pt_table[loop1].pv_va = 444 kernel_pt_table[loop1].pv_pa; 445 ++loop1; 446 } 447 } 448 449 #ifdef DIAGNOSTIC 450 /* This should never be able to happen but better confirm that. */ 451 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 452 panic("initarm: Failed to align the kernel page directory"); 453 #endif 454 455 /* 456 * Allocate a page for the system page mapped to V0x00000000 457 * This page will just contain the system vectors and can be 458 * shared by all processes. 459 */ 460 alloc_pages(systempage.pv_pa, 1); 461 462 /* Allocate a page for the page table to map kernel page tables. */ 463 valloc_pages(kernel_ptpt, L2_TABLE_SIZE / NBPG); 464 465 /* Allocate stacks for all modes */ 466 valloc_pages(irqstack, IRQ_STACK_SIZE); 467 valloc_pages(abtstack, ABT_STACK_SIZE); 468 valloc_pages(undstack, UND_STACK_SIZE); 469 valloc_pages(kernelstack, UPAGES); 470 471 #ifdef VERBOSE_INIT_ARM 472 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 473 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 474 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 475 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 476 #endif 477 478 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 479 480 #ifdef CPU_IXP12X0 481 /* 482 * XXX totally stuffed hack to work round problems introduced 483 * in recent versions of the pmap code. Due to the calls used there 484 * we cannot allocate virtual memory during bootstrap. 485 */ 486 for(;;) { 487 alloc_pages(ixp12x0_cc_base, 1); 488 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 489 break; 490 } 491 { 492 vaddr_t dummy; 493 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / NBPG - 1); 494 } 495 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 496 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 497 #endif /* CPU_IXP12X0 */ 498 499 #ifdef VERBOSE_INIT_ARM 500 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 501 #endif 502 503 /* 504 * Now we start construction of the L1 page table 505 * We start by mapping the L2 page tables into the L1. 506 * This means that we can replace L1 mappings later on if necessary 507 */ 508 l1pagetable = kernel_l1pt.pv_pa; 509 510 /* Map the L2 pages tables in the L1 page table */ 511 pmap_link_l2pt(l1pagetable, 0x00000000, 512 &kernel_pt_table[KERNEL_PT_SYS]); 513 514 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 515 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 516 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 517 518 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 519 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 520 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 521 pmap_link_l2pt(l1pagetable, PTE_BASE, &kernel_ptpt); 522 523 /* update the top of the kernel VM */ 524 pmap_curmaxkvaddr = 525 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 526 527 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 528 &kernel_pt_table[KERNEL_PT_IO]); 529 530 #ifdef VERBOSE_INIT_ARM 531 printf("Mapping kernel\n"); 532 #endif 533 534 #if XXX 535 /* Now we fill in the L2 pagetable for the kernel code/data */ 536 { 537 extern char etext[], _end[]; 538 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 539 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 540 u_int logical; 541 542 textsize = (textsize + PGOFSET) & ~PGOFSET; 543 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 544 545 logical = 0x00200000; /* offset of kernel in RAM */ 546 547 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 548 physical_start + logical, textsize, 549 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 550 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 551 physical_start + logical, totalsize - textsize, 552 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 553 } 554 #else 555 { 556 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 557 KERNEL_TEXT_BASE, kerneldatasize, 558 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 559 } 560 #endif 561 562 #ifdef VERBOSE_INIT_ARM 563 printf("Constructing L2 page tables\n"); 564 #endif 565 566 /* Map the stack pages */ 567 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 568 IRQ_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 569 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 570 ABT_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 571 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 572 UND_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 573 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 574 UPAGES * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 575 576 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 577 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 578 579 /* Map the page table that maps the kernel pages */ 580 pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa, 581 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 582 583 /* 584 * Map entries in the page table used to map PTE's 585 * Basically every kernel page table gets mapped here 586 */ 587 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 588 pmap_map_entry(l1pagetable, 589 PTE_BASE + (0x00000000 >> (PGSHIFT-2)), 590 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 591 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 592 593 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 594 pmap_map_entry(l1pagetable, 595 PTE_BASE + ((KERNEL_BASE + 596 (loop * 0x00400000)) >> (PGSHIFT-2)), 597 kernel_pt_table[KERNEL_PT_KERNEL + loop].pv_pa, 598 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 599 600 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 601 pmap_map_entry(l1pagetable, 602 PTE_BASE + ((KERNEL_VM_BASE + 603 (loop * 0x00400000)) >> (PGSHIFT-2)), 604 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 605 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 606 607 pmap_map_entry(l1pagetable, 608 PTE_BASE + (PTE_BASE >> (PGSHIFT-2)), 609 kernel_ptpt.pv_pa, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 610 611 /* Map the vector page. */ 612 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 613 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 614 615 #ifdef VERBOSE_INIT_ARM 616 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 617 systempage.pv_pa, vector_page); 618 #endif 619 620 /* 621 * Map the PCI I/O spaces and IXP12x0 registers 622 */ 623 624 ixp12x0_pmap_io_reg(l1pagetable); 625 ixp12x0_pmap_chunk_table(l1pagetable, map_tbl_ixm1200); 626 627 printf("done.\n"); 628 629 /* 630 * Map the Dcache Flush page. 631 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 632 */ 633 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 634 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 635 636 /* 637 * Now we have the real page tables in place so we can switch to them. 638 * Once this is done we will be running with the REAL kernel page 639 * tables. 640 */ 641 642 /* Switch tables */ 643 setttb(kernel_l1pt.pv_pa); 644 cpu_tlb_flushID(); 645 646 /* 647 * We must now clean the cache again.... 648 * Cleaning may be done by reading new data to displace any 649 * dirty data in the cache. This will have happened in setttb() 650 * but since we are boot strapping the addresses used for the read 651 * may have just been remapped and thus the cache could be out 652 * of sync. A re-clean after the switch will cure this. 653 * After booting there are no gross reloations of the kernel thus 654 * this problem will not occur after initarm(). 655 */ 656 cpu_idcache_wbinv_all(); 657 658 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 659 660 /* 661 * Pages were allocated during the secondary bootstrap for the 662 * stacks for different CPU modes. 663 * We must now set the r13 registers in the different CPU modes to 664 * point to these stacks. 665 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 666 * of the stack memory. 667 */ 668 printf("init subsystems: stacks "); 669 670 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 671 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 672 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 673 #ifdef PMAP_DEBUG 674 if (pmap_debug_level >= 0) 675 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 676 kernelstack.pv_pa); 677 #endif /* PMAP_DEBUG */ 678 679 /* 680 * Well we should set a data abort handler. 681 * Once things get going this will change as we will need a proper 682 * handler. Until then we will use a handler that just panics but 683 * tells us why. 684 * Initialisation of the vetcors will just panic on a data abort. 685 * This just fills in a slighly better one. 686 */ 687 printf("vectors "); 688 data_abort_handler_address = (u_int)data_abort_handler; 689 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 690 undefined_handler_address = (u_int)undefinedinstruction_bounce; 691 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 692 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 693 printf("undefined_handler_address = %08x\n", undefined_handler_address); 694 695 /* Initialise the undefined instruction handlers */ 696 printf("undefined "); 697 undefined_init(); 698 699 /* Load memory into UVM. */ 700 printf("page "); 701 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 702 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 703 atop(physical_freestart), atop(physical_freeend), 704 VM_FREELIST_DEFAULT); 705 706 /* Boot strap pmap telling it where the kernel page table is */ 707 printf("pmap "); 708 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 709 710 /* Setup the IRQ system */ 711 printf("irq "); 712 ixp12x0_intr_init(); 713 printf("done.\n"); 714 715 #ifdef VERBOSE_INIT_ARM 716 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 717 physical_freestart, free_pages, free_pages); 718 printf("freemempos=%08lx\n", freemempos); 719 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 720 #endif 721 722 consinit(); 723 printf("consinit \n"); 724 725 ixdp_ixp12x0_cc_setup(); 726 727 printf("bootstrap done.\n"); 728 729 #ifdef IPKDB 730 /* Initialise ipkdb */ 731 ipkdb_init(); 732 if (boothowto & RB_KDB) 733 ipkdb_connect(0); 734 #endif /* NIPKDB */ 735 736 #ifdef DDB 737 { 738 static struct undefined_handler uh; 739 740 uh.uh_handler = db_trapper; 741 install_coproc_handler_static(0, &uh); 742 } 743 ddb_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 744 745 if (boothowto & RB_KDB) 746 Debugger(); 747 #endif 748 749 /* We return the new stack pointer address */ 750 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 751 } 752 753 void 754 consinit(void) 755 { 756 extern struct bus_space ixpsip_bs_tag; 757 static int consinit_called = 0; 758 759 if (consinit_called != 0) 760 return; 761 762 consinit_called = 1; 763 764 if (ixpcomcnattach(&ixpsip_bs_tag, IXPCOM_UART_BASE, 765 CONSPEED, CONMODE)) 766 panic("can't init serial console @%lx", IXPCOM_UART_BASE); 767 } 768 769 #ifdef DEBUG_BEFOREMMU 770 cons_decl(ixpcom); 771 void 772 fakecninit() 773 { 774 static struct consdev fakecntab = cons_init(ixpcom); 775 cn_tab = &fakecntab; 776 777 (*cn_tab->cn_init)(0); 778 cn_tab->cn_pri = CN_REMOTE; 779 } 780 #endif 781 782 /* 783 * For optimal cache cleaning we need two 16K banks of 784 * virtual address space that NOTHING else will access 785 * and then we alternate the cache cleaning between the 786 * two banks. 787 * The cache cleaning code requires requires 2 banks aligned 788 * on total size boundry so the banks can be alternated by 789 * eorring the size bit (assumes the bank size is a power of 2) 790 */ 791 void 792 ixdp_ixp12x0_cc_setup(void) 793 { 794 int loop; 795 paddr_t kaddr; 796 pt_entry_t *pte; 797 798 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 799 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += NBPG) { 800 pte = vtopte(ixp12x0_cc_base + loop); 801 *pte = L2_S_PROTO | kaddr | 802 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 803 PTE_SYNC(pte); 804 } 805 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 806 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 807 } 808
Indexes created Thu Oct 02 14:10:14 GMT 2025